Information recording carrier

1. An information recording carrier having minute pattern including plural grooves or lands formed to be substantially in parallel and adjacent to each other, comprising:

a supporting body having the minute pattern thereon;

a recording layer formed on the minute pattern; and

a light transmission layer formed on the recording layer,

wherein when a pitch of each groove or land is P, a wavelength of a laser beam is λ and a numerical aperture of an objective lens is NA, the minute pattern is formed under a relation of P <λ/NA;

wherein the plural grooves or lands include at least a wobbling region and data is recorded wobblingly in the wobbling region by frequency shift modulation parts and single frequency parts;

wherein each frequency shift modulation part is carried out by frequency shift modulation in which with a predetermined frequency having one of 1-100 waves as a channel bit, the frequency is changed over for each channel bit; and

wherein each frequency shift modulation part includes a first frequency shift modulation region where a first specified data pattern is disposed and a second frequency shift modulation region where a second specified data pattern is disposed, the first and second frequency shift modulation regions are alternately arranged on adjacent frequency shift modulation parts, and data showing a value depending on a mutual distance between a position at which the first specified data pattern is disposed in the first frequency shift modulation region and a position at which the second specified data pattern is disposed in the second frequency shift modulation region is recorded.

2. A method of reproducing the information recording carrier as recited in claim 1 , comprising:

irradiating the laser light on the recording layer through the light transmission layer in such a way that the laser light tracks the grooves or lands therebeneath;

detecting the laser light reflected by the recording layer; and

recognizing the frequencies that are used in frequency shift modulation through the detected laser light.